Appearance: The dog is compact, moderately low set, of medium length with a refined structure but of sufficient substance to suggest the ability to hunt and kill domestic rodents. The parted, straight silky hair presents a well-groomed appearance.
Temperament: Intelligent, lively.
Characteristics: Should display Terrier characteristics, embodying keen alertness, activity and soundness.
Colour: Rich Blue or Grey-Blue. Tan on the muzzle, ears & legs. 18 months or less usually darker.
Coat: Must be flat, fine and glossy and of a silky texture. The length of coat must not be so long as to impede the dog’s action and should allow daylight to be seen under the dog. The front and rear feet to be free from long hair.